Education and demonstration – Mathematics – Arithmetic
Patent
1990-01-11
1991-05-28
Apley, Richard J.
Education and demonstration
Mathematics
Arithmetic
434347, 434188, 273299, G09B 100
Patent
active
050189760
ABSTRACT:
A flash card type of teaching system includes problem cards that are divided into sets by color coding. A key card that is in view of the student(s) contains answer information that is also color coded to assist the student(s) in choosing the correct response to a particular problem.
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Trivial Pursuit, 1981.
Apley Richard J.
Healey Rachel M.
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